Image Processing using Matlab ( using a built in Highboost filtering,averaging filter)

1. Digital Image Processing
Project # 3
Dr.Nathir Rawashdeh
Name : Majd Ali Khaleel
ID # :2008102003
19.Dec.2010

2. *I have used MATLAB to implement
Highboost filtering.
1)my code :
In my code I have used the averaging filter to producean blurry
image ,after that I haveused laplacian filter on the blurry image
with factor k=3,
therefore the image became sharper than the original image .

3. 2) fig(2.1) fig(2.2)
* I have loaded an image ,then I have applied the
averaging filter on it(=blurry image) ,after that I applied
my code on blurry image .
We can note the result in figure(2.2).

4. 3) here I have used a different values of factor ( k )
(k=5)(k=1)
(k=9) (k=18)
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4)
The best value of k is 1.5 .

5. When k is larger than 1.5 the contribution of the
sharpening process becomes less and less important & if
the k is large enough, the high boost image will be
approximately equal to the original image multiplied by a
constant & the image will be lighter and lighter (more
sharpening)